Reading from other files

With the help from others I am able to now read from a cell on another worksheet using the below formula:
=VLOOKUP($B$3,INDIRECT("'"&$B$2-1&"'!$A$6:$E$11"),5)

If i wanted this to read from another file named after cell B2 what would it look like.

The formula is in the Student Results worksheet on the attached file.

Paul